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Finding the Fourth Proportional to 1,643.91, 2,465.87 and 670.10

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Solution

The fourth proportional to 1,643.91, 2,465.87 and 670.10 is: 1,005.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.91 : 2,465.87 = 670.10 : x
  2. Step 2: Convert to fraction form
    1,643.91/2,465.87 = 670.10/x
  3. Step 3: Cross multiply
    1,643.91x = 2,465.87 × 670.10
  4. Step 4: Simplify right side
    1,643.91x = 1,652,363.81
  5. Step 5: Solve for x
    x = 1,652,363.81/1,643.91
  6. Step 6: Final answer
    x = 1,005.14

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.